Error Messages:

69% building 4279/4311 modules 32 active ...\jeecg-boot-v3.1.0\ant-design-vue-jeecg\node_modules\ant-design-vue\es\vc-tabs\src\TabPane.js[@vue/compiler-sfc] the >>> and /deep/ combinators have been deprecated. Use :deep() instead.

[@vue/compiler-sfc] the >>> and /deep/ combinators have been deprecated. Use :deep() instead.

98% after emitting CopyPlugin

 ERROR  Failed to compile with 1 error                                                                                         下午9:48:08
 error  in ./src/components/NumberInfo/NumberInfo.vue?vue&type=style&index=0&id=4370c5af&lang=less&scoped=true&

Syntax Error: TypeError: Cannot set properties of undefined (setting 'parent')


 @ ./node_modules/vue-style-loader??ref--10-oneOf-1-0!./node_modules/css-loader??ref--10-oneOf-1-1!./node_modules/vue-loader/lib/loaders/stylePostLoader.js!./node_modules/postcss-loader/src??ref--10-oneOf-1-2!./node_modules/less-loader/dist/cjs.js??ref--10-oneOf-1-3!./node_modules/cache-loader/dist/cjs.js??ref--0-0!./node_modules/vue-loader/lib??vue-loader-options!./src/components/NumberInfo/NumberInfo.vue?vue&type=style&index=0&id=4370c5af&lang=less&scoped=true& 4:14-483 15:3-20:5 16:22-491
 @ ./src/components/NumberInfo/NumberInfo.vue?vue&type=style&index=0&id=4370c5af&lang=less&scoped=true&
 @ ./src/components/NumberInfo/NumberInfo.vue
 @ ./src/components/NumberInfo/index.js
 @ ./node_modules/cache-loader/dist/cjs.js??ref--12-0!./node_modules/babel-loader/lib!./node_modules/cache-loader/dist/cjs.js??ref--0-0!./node_modules/vue-loader/lib??vue-loader-options!./src/views/Home.vue?vue&type=script&lang=js&
 @ ./src/views/Home.vue?vue&type=script&lang=js&
 @ ./src/views/Home.vue
 @ ./src/config/router.config.js
 @ ./src/router/index.js
 @ ./src/utils/request.js
 @ ./src/main.js
 @ multi (webpack)-dev-server/client?http://192.168.49.133:3000/sockjs-node (webpack)/hot/dev-server.js ./src/main.js

Solution:

Delete yarn.lock, node_modules, and re-execute yarn install, yarn run serve

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